{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

notes44 - Dont get the idea that DDP just means a...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Don’t get the idea that DDP just means a two-dimensional table of operator and type names! DDP is a very general, great idea. It means putting the details of a system into data, rather than into programs, so you can write general programs instead of very specific ones. In the old days, every time a company got a computer they had to hire a bunch of programmers to write things like payroll programs for them. They couldn’t just use someone else’s program because the details would be different, e.g., how many digits in the employee number. These days you have general business packages and each company can “tune” the program to their specific purpose with a data file. Another example showing the generality of DDP is the compiler compiler . It used to be that if you wanted to invent a new programming language you had to start from scratch in writing a compiler for it. But now we have formal notations for expressing the syntax of the language. (See section 7.1, page 38, of the Scheme Report at the back of the course reader.) A single program can read these formal descriptions and compile
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern